The last time we saw Randy Moss in an NFL game was Jan. 2, 2011. Wearing a Tennessee Titans uniform, the third different one he wore that season, Moss caught an 18-yard pass from the now-retired Kerry Collins in a 23-20 loss to the Indianapolis Colts.

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"His motivation level is high," San Francisco 49ers running back Brandon Jacobs said on CBS Sports Network's "Rome" (via Michael David Smith of Pro Football Talk). "I think Moss has a chip on his shoulder. Iâve spoken to him a lot, and he starts off everything with, 'Just wait.' He's got a chip on his shoulder, he's ready to go out there and show everybody that he can play still."

Moss giving up on a season, which he did in 2010, is nothing new. He did the same to the 2006 Oakland Raiders and (voila!) was a record-setting All-Pro the following season with the Patriots. That was five seasons ago, however, when Moss was 30-years-old and playing with Tom Brady. Moss is now 35 and playing with Alex Smith in an offense that doesn't throw the ball downfield with a great deal of regularity.

We'll have to wait and see if Moss' motivation level remains high when he's being used a decoy for Michael Crabtree and Vernon Davis, but our guess is after running mostly clearing routes, the chip on Moss' shoulder will soon become a pain in Jim Harbaugh's neck.